Pulsating device for milking apparatus.



PATENTED JAN. 7, 1908.

' B. E. GOOD. PULSATING DEVICE FOR MILKING APPARATUS.

APPLICATION FILED FEB. 11. 1907.

I To all 'whom it may I EZRA Elcoon, OF WATERLOO, IOWA.

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not ounce.

Specification of Letters Patent.

Patented Jan, 7,1908.

Application filed February 11. 1907. Serial No, 356.674.

concern:

Be it known that I, EZRA E. G001), a citizen of the United {States, residing at Water- 100, in the county of Blackhawk and State of Iowa, have invented certain new and useful Improvements in Pulsating Devices for Milkis reached, and for positively holding infi Apparatus; and I do hereby declare the fo owing to be a full, clear, and exact description of the invention, such as will'enable others skilled inthe art to which it apper- .tains to make and use the same.

My invention relates to cow milking apparatus of that general character wherein the 'milk is drawn from the cowthrough tubes and by the action of suction or partial vacuum roduced in said tubes by an air ump.

therto, devices for producing pu sations or variations in the suction or partial vacuum have been provided in this c ass of apparatus, the purpose of these pulsations being to produce a milking action more nearly like to that roduced by the hands in the ordi nary g action, and .also thereby increase the efficiency of the apparatus and, furthermore, to produce an action which is more agreeable to the cow. A ulsating device forthe above purpose is 'sclosed and claim'edin my prior patent 'No. 812,842 of date February 20, 1906, entitled Milking ap aratu's.

y present invention ve greatly improves the action of these p sating devices and accom lishes the result'by the provision of means or automatically opening a vent valve when the maximu'm suction or vacuurpl suc 'vent open until the suction has been re eved,

or otherwise stated, the vacuum has been reduced by the admission of air to the minimum.-

The improved device is illustrated in the accompanying drawings, wherein like characters indicate like parts throughout the several views.

Referring to the drawings, Figure 1 is a perspective view, illustrating my invention incorporated in a milking apparatus attached to the stalls of a barn and applied to several cows and Fig. 2 is an enlarged detail, principally in vertical section, but with some arts in full, illustrating the construction 0 the im roved pulsating device. I

he numeral 1 indicates the floor and'the numeral 2 the stall posts rigidly secured in ter 2 indicates the cows within the stalls, and which are being milked by the apparatus.

The numeral 3 indicates an air pipe which leads to an air pum (not shown) by means of which the partia vacuum is produced in the various pipes and tubes of the milking apparatus. At one end, the pipe 3 leads from a horizontally extended p1 e 4 having .plpe 4.

The numeral 8 indicates a milk can that is provided with a removable cover 9 of the usual or any suitable construction which will make the can approximatel air tight; I Que .of these cans-8 is connecte to each branch pipe 5, preferably by means of a'flexible'hose 10 that opens into the upper portion of said can, preferably through a trap pipe 11. Another flexible hose 12 opens into the upper portion of said can 8, as shown, through said trap 11 and is provided in its other end with branch pipes 13 having teat cups 14 of suitable construction. The apparatus sof' far, specifically described in connection with the awings is that shown in my said'prior patent above identified, but it will, of course, be understood that so far as my present invention is concerned," these features of the appa-. ratus may be of any suitable construction.

. The device for producing the pulsationin the vacuum or suction pipes and tubes of the apparatus is preferably located at that end of t e pipe 4 which is most distant from the pump connecting pipe 3, and as shown, the said pipe 4 at said extended end, is rovided with a T-coupling 15 having axial y alined upwardly and downwardly extended tubes 16 and 17, the latter of which constitutes a cylinder in which works a piston 18. ISaid piston 18 is provided with a depending stem19 that works through a skeleton head 20 of a cap 21 which, as shown, is ap lied to the lower end of said cylinder 17. an is providedwith an offset arm 22. To the arm 22 is pivoted a trip lever 23 which, as shown, has a perforation through which the piston stem 19 works freely; 'The 'stem 19 -provided the usual or any suitable way. The characza rial vent tube 29, that is normally closed by with a series of perforations and above said l long and well defined lever 23 18 provided with a collar 24 which, i

by means of a suitable pin passed therethrough and through one of the perforations of said stem, may be secured in any desired position thereon. The lower end of the stem '19 is, as shown, telescoped into an axial perforation of a weight 25 and is passed through a bail 26 on the upper end thereof. A 1 in 27. passed through a perforation below the bail 26 adjustably connects the weight 25 to said piston stem and causes the bail 26 to act as a trip' against the bottom of the lever 2-3. To

the upper end of the tube 16 is secured a cap 28, which, as shown, is provided with an a ,v -alye 30 pivoted to a lug 31 on'said cap.

To'fanother-lug 32 on the cap 28, below the p et ng free end of the vent valve 30', is"

pivotedfla valve trlppmg'dog 33 in the form I of abellcrank. To the lower arm of the bell crank or dog 33 is pivotally attached the upper end of a trip which is loosely 2 5 rod 34, the lower end of ut adjustably connected to the free end of the triplever 23-by nuts 35 or other suitable devices. A light coiled spring 36 attached to the dog 33 and to the lug 31 is gadapted' to be moved from one side to another of a dead centerwith respect to the to] pivotof the said 'dog 33, under vibratory movements of the latter.

' Fig. 2 illustrates the position of the parts I when there is little or no suction or vacuum ,within the tubes and pipes of the apparatus. When the suction'or vacuum wit 'n the tubes and pipes .of the apparatus approaches a maximum, the iston 18 and weig t 25 carried thereby will he raised, thereby throwing the bail 26 against the trip lever 23, raising the latter and, through the trip rod 34, Wil 33 upward and cause t e latterto raise t' e valve .30 and open the vent 29. The'opening of the vent 29, as is evident, allows air to freely flow into the tubes and pipes'of the apparatu's, thereby decreasing the vacuum or suction and allowing the pistngflS and its weight 25 to drop back to normal position. The valve 30,' o

wever, will not be permitted to immediately close as'soon as the suctlon or vacuum is decreased by the admission of air intothe tubes. of .the apparatus, but, on the contrary, will be held open by the spring held dog 33 until the piston 18 and its weight .25 have nearly'greached the limit. of their downward movement, whereupon, the collar 24 of the stem 19. will strike the trip lev'er23 and, throu h the trip rod 34, will move the dog 33 back to the osition shown in Fig: 2,. and permit the va ve 30 to again close'the vent 29. As is obvious, assoon as the vent 29 has thus been closed, the suction from the air pump will again raise the piston 18 and its weight 25. In this way, comparatively pulsations will be produced.

in pulsating devices hitherto used, the tendency has been for the relief valve to close as soon as a very slight amount of air has been admitted into the pipes of the apparatus, and this has ha. a tendency to produce a rapid series of sl ght fluctuations, as

distinguished from relatively long and well defined pulsations under which the suction or vacuum is varied to the material and very much desired extent required for a good milking action. The length of the pulsations and the intensity thereof maybe varied by adjustments of the weight 25 and its bail 26 upon the piston rod 19. It is evident that the higher'up the said weight and its bail are lally actuated vibratory controller subject to varying vacuum or pressure from within said apparatus, a vent opening into the air cond'uit of said apparatus, a valve for opening and closing said vent, and a valve actuating connection subject to said controller and arranged to remain set in either of its two extreme positions during a material part of the movement of said controller, but which 6011-. troller is arranged to operate on said actuating connection to open said valve under extreme movement in one direction and to close said valve under extreme movement in the other direction, substantially as described.

2. In a milking .apparatus, means for producing pulsations, comprising an automatically actuated vibratory controller subject to varying vacuum or pressure fromv within said apparatus, a vent opening into the air conduit of said apparatus, a valve for opening and closing said vent, a valve actuating connection subject to said controller and urranged to remain set in either of its two extreme positions during a material part of the movement of said controller, but which controller is arranged to operate on said actuating connection to open said valve'under extreme movement in one direction and to close said valve under extreme movement in the other direction, and means for adjusting or varying theaction of said controller in respect to the amount of movement required to render the same operative on said valve actuating connection, substantially as described.

3. In a milking apparatus, means for producing pulsations therein, comprising a vent valve controlling and opening into an air conduit of said apparatus, a pivoted tripping dog operative on said vent valve, a spring tending tohold said tripping dog in either ofthe two positions in which it may be set, a tripping lever, a rod connecting said tripping lever to said tripping dog, and a weighted piston working in a tube of said apparatus and operating on said tripping lever under 10 extreme movements, substantially as described.

In testimony whereof I aflix my signature in presence of two Witnesses.

EZRA E. GOOD. Witnesses: \lALin Hon, 1*. I). MERCHANT. 

